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• Analysis of 50 questions for elementary mathematics examination summary Analysis of 50 questions for elementary mathematics examination (1) Analysis of 50 questions for elementary mathematics examination (2) Analysis of 50 questions for elementary mathematics examination (3) Analysis of 50 question types (4) 50 questions for elementary school mathematics (5) Analysis of 50 questions for elementary school
• Elementary Mathematics Exam 50 Question Type Analysis (50) A piece of parallelogram. If you only increase the bottom by 8 meters, or only increase the height by 5 meters, its area will increase by 40 square meters. What is the original area of this parallelogram? Problem solving ideas: According to only increasing the bottom by 8 meters, the area will increase by 40 square meters.
• Analysis of 50 questions in elementary mathematics exam (forty-nine) Teacher Wang has a box of pencils, such as 2 points for 2 students, 3 points for 3 students, 3 points for 4 students, 3 points for 4 students The average score was given to 5 students with 4 remaining ones. Ask at least how many pencils are in this box? Solution ideas: According to the meaning of the problem,
• Analysis of 50 questions for primary school mathematics exam (forty-eight) My father is 45 years old and my son is 15 years old. How many years ago was my father's age 11 times his son's age? Solution: The difference between the age of the father and the child is (45-15) years old. When the father's age is 11 times the age of the son, the difference is exactly the age of the son (11-
• 50 questions for elementary school mathematics examination (forty-seven) At 6 am, buses 1 and 2 will be issued from the bus station at the same time, bus 1 will be sent every 12 minutes, bus 2 will be sent every 18 minutes, Find the next departure time. Solution ideas: The next time the 1st and 2nd trains start at the same time, the elapsed time must be both 1
• Elementary mathematics compulsory analysis of 50 questions (forty-six) There are the same number of black and white balls in the box. Each time 8 black balls and 5 white balls are taken out. After taking out a few times, the black balls are gone and there are 12 white balls left. How many times have they been taken? How many balls are there in the box? Solution idea: the number of two balls is equal, the black ball
• Analysis of 50 questions required for elementary school mathematics (forty-five) The two of them are facing each other from two places at a distance of 135 kilometers, and they meet after 3 hours. A's speed is twice that of B. How many kilometers does A and B travel each hour? Solution ideas: From the problem, the speed sum of A and B is (135 3) kilometers, and the speed sum is
• Analysis of 50 questions for elementary school mathematics exam (44) Mom buys 3 kg each of apples and pears and pays 20 yuan to get back 7.4 yuan. 2.4 yuan per kilogram of apple, how much per kilogram of pear? Solution: Divide the amount of money divided by 3 to get the total amount of money for 1 kg of apples and 1 kg of pears. Remove 1 kg of apples from this total money
• Elementary mathematics compulsory analysis of 50 questions (43) There is a rectangular cardboard. If you only increase the length by 2 cm, the area will increase by 8 square meters; if you increase the width by 2 cm, the area will increase by 12 square centimeters. What was the original area of this rectangular cardboard? Solution ideas: increase the width by only 2 cm
• Analysis of 50 questions in elementary mathematics exam (forty-two) There is a circular track of 600 meters in a week. A and B are walking simultaneously, in the same place and in the same direction. A runs 300 meters per minute and B runs 400 each minute. M. After a few minutes, the two met for the first time? Solution: From the known conditions, when the two met for the first time,
• Elementary Mathematics Exam 50 Question Type Analysis (41) Xiao Ming from home to school, if you walk 50 meters per minute, it is exactly the class time; if you walk 60 meters per minute, you have 2 minutes before class time. Q How far is Xiaoming from home to school? Problem Solving Ideas: Walk at two speeds within the school time of 50 meters per minute
• 50 questions for elementary school mathematics examination (forty) A train is 600 meters long and passes through a tunnel of 1,150 meters long. The speed of the train is known to be 700 meters per minute. How long does it take for the train to pass through the tunnel? Train of thought: Train passing through the tunnel means entering the tunnel from the front of the train to leaving the tunnel at the end of the train. The distance traveled is exactly
• Elementary Mathematics Exam 50 Question Type Analysis (39) Guangming Elementary School held a math knowledge contest with a total of 20 questions. You get 5 points for a correct answer, 3 points for a wrong answer, and 0 points for a non-answer. Xiaoli scored 79 points. How many correct and incorrect answers did she get? Problem-solving ideas: the two cars are separated from each other
• Elementary Mathematics Exam 50 Question Type Analysis (38) Guangming Elementary School held a math knowledge contest with a total of 20 questions. You get 5 points for a correct answer, 3 points for a wrong answer, and 0 points for a non-answer. Xiaoli scored 79 points. How many correct and incorrect answers did she get? Solution ideas: According to the meaning of the questions, all 20 questions are answered correctly 100
• Analysis of 50 questions for primary school mathematics test (37) There are two barrels of oil. The weight of barrel A is 4 times the weight of barrel B. If 18 kg of barrel B is poured into barrel B, the weight of two barrels of oil is the same. How many kilograms of oil does each barrel have? Solution: If you pour 18 kg from barrel A into barrel B, two barrels of oil will be the same weight.
• Analysis of 50 questions in elementary mathematics exam (36) Father is 45 years old this year, 5 years ago father is 4 times his son, how old is his son this year? Ideas for solving the problem: 5 years ago, the father's age was (45-5) years old, the son's age was (45-5) 4 years old, plus 5 is the age of his son this year. Answer: Solution:
• Elementary mathematics compulsory analysis of 50 questions (35) The school bought 4 tables and 6 chairs for a total of 640 yuan. The price of 2 tables and 5 chairs is the same. How much is the unit price of the table and chair? Solution idea: From the condition that the price of 2 tables and 5 chairs are equal, 4 tables can be introduced
• Primary and Middle School Mathematics Exam 50 Question Type Analysis (34) The school organizes a Chinese and Mathematics double subject competition. There are 59 students in the third grade, 36 people in the Chinese language contest, 38 people in the math competition, and one subject. There were 5 people who did not participate. How many people are involved in both subjects? Problem solving ideas: 36 people participating in the language competition
• Analysis of 50 questions for elementary school mathematics exam (33) The school held a singing and dancing party, and a total of 80 people participated in the performance. There are 70 people singing and 30 people dancing. How many people are singing and dancing? Ideas for solving the problem: According to the problem, the actual 10 days produced more cement (4.8 10) tons than the originally planned 10 days, and more
• 50 questions in elementary mathematics exam (32) Cement factory originally planned to complete a task in 12 days. As a result of producing 4.8 tons of cement per day, the task was completed in 10 days. How many tons of cement were originally planned to produce per day? Problem solving ideas: From the problem, it is known that the actual 10 days will produce more cement than the original planned 10 days (4.8 10
• Elementary mathematics compulsory examination 50 questions type analysis (31) Connect a thin steel pipe to a thick steel pipe. If two small steel pipes are connected, the total length is 18 meters, and if five small steel pipes are connected, the total length is 33 meters. How many meters is a thick steel pipe and a thin steel pipe each? Ideas for solving the problem: According to the meaning of the problem, the number of meters that is 33 meters longer than 18 meters is exactly 3 thin steel pipes.
• Elementary mathematics exam 50 questions type analysis (30) There are three colors of red, yellow, and white balls. There are 21 red and yellow balls, 20 yellow and white balls, and red and white balls. 19. How many of the three balls are there? Solution ideas: Knowing the conditions, (21 + 20 + 19) means twice the total number of three balls
• Analysis of 50 questions for elementary school mathematics exam (29) A and B are facing each other at the same time from two places 18 kilometers apart, A walking 5 kilometers per hour, B walking 4 kilometers per hour. If A brings a dog and A at the same time, the dog runs towards B at a speed of 8 kilometers per hour. When B meets B, he immediately runs back to A,
• Analysis of 50 questions for elementary school mathematics exam (28) Li Qiang rides a bicycle from Jiadi to Yidi, travels 12 kilometers per hour, and arrives in 5 hours. When returning from Yidi to Jiadi, it takes more than 1 hour due to the headwind. How many kilometers per hour? Problem solving ideas: From 12 kilometers per hour, 5 hours to reach two places
• Analysis of 50 questions for primary school mathematics exam (27) In a workshop, there are 35 fewer female workers than male workers. After 17 male and female workers are transferred, the number of male workers is twice that of female workers. How many original male workers? How many women workers? Problem-solving ideas: There are 35 fewer female workers than male workers. After 17 male and female workers are transferred, female workers are still
• 50 questions for elementary school mathematics examination (26) It takes 9 minutes to saw a piece of wood into 3 sections, so how many points do you need to saw this piece of wood at the same speed? Problem-solving ideas: Saw a piece of wood into 3 sections and saw only (3-1) sawing edges, so that you can find what you need to saw each sawing edge.
• Elementary mathematics compulsory analysis of 50 questions (25) There are 5 barrels of oil with the same weight. If 15 kg are taken out from each barrel, the weight of the remaining oil in the 5 barrels is exactly equal to the original 2 barrels of oil. . How many kilograms does the original barrel of oil weigh? Solution: From the known conditions, 5 barrels of oil were taken out (15 5) kg.
• Analysis of 50 questions in elementary mathematics exam (twenty-four) Xiao Hong and Xiao Hua have 36 story books. If Xiaohong gave Xiaohua 5 books, the number of storybooks of the two would be equal. Problem-solving ideas: From Xiaohong to Xiaohua, the number of stories of the two is equal.
• Elementary mathematics compulsory analysis of 50 questions (twenty-three) Use a bucket of water to add twice the original water, and the barrel weighs 10 kg. If you add 5 times the original weight, the barrel weighs 22 kilogram. How many kilograms of water are in the bucket? Solution: From the known conditions, (5-2) times the original water in the bucket is exactly (2
• Elementary mathematics compulsory 50 questions type analysis (22) A barrel of oil with a barrel weighing 10 kg, after pouring out half, the barrel still weighs 5.5 kg. How many kilograms of oil do you have? Solution: From the known conditions, the difference between 10 kg and 5.5 kg is exactly the weight of half a barrel of oil, and then multiplied by 2 is the weight of the original oil. Answer
• Elementary mathematics compulsory test 50 questions type analysis (twenty-one) A barrel of oil with a barrel weighing 16 kg, after half of use, even a barrel weighing 9 kg, how many kilograms? Solution: From the known conditions, the difference between 16 kg and 9 kg is exactly the weight of half a barrel of oil. 9 kg is the weight of half a barrel of oil and barrel, remove the weight of half a barrel of oil
• Elementary mathematics compulsory analysis of 50 question types (twenty) The sum of two numbers is 572. One of the addends is 0. After removing 0, it is the same as the second addend. What are these two numbers? Solution idea: Knowing that one addend is 0, and removing 0 is the same as the second addend, we know that the first addend
• Analysis of 50 questions in elementary mathematics exam (nineteen) Five thermos flasks and 10 tea cups were bought in the school, and 90 yuan was shared. Each thermos bottle is 4 times the price of each tea cup. How much is each thermos bottle and each tea cup? Solution ideas: According to the price of each thermos flask is 4 times the cost of each tea cup, 5
• Analysis of 50 questions for primary school mathematics test (eighteen) A batch of sand and cement is transported into a construction site, and the number of sand bags is twice that of cement. 30 bags of cement and 40 bags of sand are used every day. After a few days, all the cement is used up, and 120 bags of sand are left. How many bags of sand and cement each? Solving ideas: by known conditions
• Analysis of 50 questions required for elementary school mathematics (seventeen) A shoe factory produces 1,800 pairs of shoes, which are packed into 12 cardboard boxes and 4 wooden boxes respectively. If you have 3 cartons and 2 wooden boxes, you have the same number of shoes. How many pairs of shoes are in each carton and each wooden box? Solution ideas: According to known conditions, 12 cartons can be converted into
• Analysis of 50 questions in elementary mathematics exam (16) A road construction team has undertaken the task of building a highway. The original plan was to repair 720 meters per day, and the actual daily repair was 80 meters more than the original plan, so the actual repair distance of 1200 meters could be completed 3 days in advance. How long is this road? Problem solving ideas: According to the plan, 720 meters per day